US11804130B2 - Vehicle identification method and apparatus, primary device, and secondary device - Google Patents
Vehicle identification method and apparatus, primary device, and secondary device Download PDFInfo
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- US11804130B2 US11804130B2 US17/361,084 US202117361084A US11804130B2 US 11804130 B2 US11804130 B2 US 11804130B2 US 202117361084 A US202117361084 A US 202117361084A US 11804130 B2 US11804130 B2 US 11804130B2
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
Definitions
- Implementations of the present specification relate to the field of Internet technologies, and in particular, to a vehicle identification method and apparatus, a primary device, and a secondary device.
- vehicle identities are generally automatically identified by using solutions such as electronic toll collection (ETC), vehicle license plate identification, or Bluetooth cards.
- ETC electronic toll collection
- vehicle license plate identification e.g., vehicle license plate number
- Bluetooth cards e.g., Bluetooth cards.
- the ETC identifies a vehicle (e.g., through a vehicle license plate number), through microwave dedicated short-range communication between an in-vehicle electronic label installed on a vehicle windshield and a microwave antenna on an ETC lane of a toll station.
- Implementations of the present specification provide a vehicle identification method and apparatus, a primary device, and a secondary device, which improves the accuracy of vehicle identification and the accuracy of detecting the location of a vehicle.
- the implementations of the present specification provide a vehicle identification method, including: sending, by a primary device, a low-frequency signal with a predetermined radiation range; receiving a response signal sent by a secondary device located on a vehicle responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold; and communicating with the secondary device to obtain identity information of the vehicle on which the secondary device is located.
- the primary device after sending the low-frequency signal, receives the response signal sent by the secondary device responding to the low-frequency signal, and communicates with the secondary device to obtain the identity information of the vehicle on which the secondary device is located, so that the vehicle can be identified.
- the response signal is sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that the signal strength of the low-frequency signal is greater than or equal to the predetermined threshold, and the signal strength of the low-frequency signal rapidly attenuates as the distance increases, so that the primary device can determine the location of the vehicle on which the secondary device is located solely based on the received response signal. Therefore, the vehicle on which the secondary device is located can be positioned accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- the method further includes: before the communicating with the secondary device to obtain the identity information of the vehicle on which the secondary device is located, determining that the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determining that the vehicle on which the secondary device is located is a vehicle to be identified.
- the communicating with the secondary device to obtain the identity information of the vehicle on which the secondary device is located includes: communicating with the secondary device to receive the identity information of the vehicle on which the secondary device is located that is sent by the secondary device; or communicating with the secondary device to receive an identifier of the secondary device that is sent by the secondary device, and obtain the identity information of the vehicle on which the secondary device is located based on the identifier of the secondary device.
- the implementations of the present specification provide a vehicle identification method, including: receiving, by a secondary device, a low-frequency signal sent by a primary device; detecting signal strength of the low-frequency signal; sending a response signal to the primary device in response to the signal strength of the low-frequency signal being greater than or equal to a predetermined threshold; and communicating with the primary device to cause the primary device to obtain identity information of a vehicle on which the secondary device is located.
- the secondary device After receiving the low-frequency signal sent by the primary device, the secondary device detects the signal strength of the low-frequency signal. In response to the signal strength of the low-frequency signal being greater than or equal to the predetermined threshold, the secondary device sends the response signal to the primary device, and communicates with the primary device to cause the primary device to obtain the identity information of the vehicle on which the secondary device is located, so that the primary device can accurately position the vehicle on which the secondary device is located, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- the implementations of the present specification provide a vehicle identification method, including: sending, by a primary device located on a vehicle, a low-frequency signal with a predetermined radiation range; receiving a response signal sent by a secondary device responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold; and communicating with the secondary device to cause the secondary device to obtain identity information of the vehicle on which the primary device is located.
- the primary device after sending the low-frequency signal, receives the response signal sent by the secondary device responding to the low-frequency signal, and communicates with the secondary device to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located, so that the vehicle can be identified.
- the response signal is sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that the signal strength of the low-frequency signal is greater than or equal to the predetermined threshold, and the signal strength of the low-frequency signal rapidly attenuates as the distance increases, so that the primary device can determine the distance between the secondary device and the vehicle on which the primary device is located solely based on the received response signal. Therefore, the vehicle on which the primary device is located can be positioned accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- the method further includes: before the communicating with the secondary device to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located, determining that the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determining that the vehicle on which the primary device is located is a vehicle to be identified.
- the communicating with the secondary device to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located includes: communicating with the secondary device to send the identity information of the vehicle on which the primary device is located to the secondary device; or communicating with the secondary device to send an identifier of the primary device to the secondary device, to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located based on the identifier of the primary device.
- the implementations of the present specification provide a vehicle identification apparatus, including: a sending module, configured to send a low-frequency signal with a predetermined radiation range; a receiving module, configured to receive a response signal sent by a secondary device located on a vehicle responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold; and an acquisition module, configured to communicate with the secondary device to obtain identity information of a vehicle on which the secondary device is located.
- the apparatus further includes: a determining module, configured to: before the acquisition module obtains the identity information of the vehicle on which the secondary device is located, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the secondary device is located is a vehicle to be identified.
- a determining module configured to: before the acquisition module obtains the identity information of the vehicle on which the secondary device is located, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the secondary device is located is a vehicle to be identified.
- the acquisition module is configured to communicate with the secondary device to receive the identity information of the vehicle on which the secondary device is located that is sent by the secondary device; or communicate with the secondary device to receive an identifier of the secondary device that is sent by the secondary device, and obtain the identity information of the vehicle on which the secondary device is located based on the identifier of the secondary device.
- the implementations of the present specification provide a vehicle identification apparatus, including: a receiving module, configured to receive a low-frequency signal sent by a primary device; a detection module, configured to detect signal strength of the low-frequency signal; a sending module, configured to send a response signal to the primary device in response to the signal strength of the low-frequency signal being greater than or equal to a predetermined threshold; and a communication module, configured to communicate with the primary device to cause the primary device to obtain identity information of a vehicle on which the secondary device is located.
- the implementations of the present specification provide a vehicle identification apparatus, including: a sending module, configured to send a low-frequency signal with a predetermined radiation range; a receiving module, configured to receive a response signal sent by a secondary device responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold; and a communication module, configured to communicate with the secondary device to cause the secondary device to obtain identity information of a vehicle on which a primary device is located.
- the apparatus further includes: a determining module, configured to, before the communication module communicates with the secondary device, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the primary device is located is a vehicle to be identified.
- a determining module configured to, before the communication module communicates with the secondary device, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the primary device is located is a vehicle to be identified.
- the communication module is configured to communicate with the secondary device to send the identity information of the vehicle on which the primary device is located to the secondary device; or communicate with the secondary device to send an identifier of the primary device to the secondary device, to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located based on the identifier of the primary device.
- the implementations of the present specification provide a primary device, including: at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the method provided in the first aspect.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the method provided in the first aspect.
- the implementations of the present specification provide a secondary device, including: at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the method provided in the second aspect.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the method provided in the second aspect.
- the implementations of the present specification provide a primary device, including: at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the method provided in the third aspect.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the method provided in the third aspect.
- FIG. 1 is a flowchart illustrating an implementation of a vehicle identification method according to the present specification.
- FIG. 2 is a schematic diagram illustrating installation locations of a primary device and a secondary device according to an implementation of the present specification.
- FIG. 3 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification.
- FIG. 4 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification.
- FIG. 5 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification.
- FIG. 6 is a schematic diagram illustrating installation locations of a primary device and a secondary device according to another implementation of the present specification.
- FIG. 7 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification.
- FIG. 8 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification.
- FIG. 9 is a schematic structural diagram illustrating an implementation of a vehicle identification apparatus according to the present specification.
- FIG. 10 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- FIG. 11 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- FIG. 12 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- FIG. 13 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- FIG. 14 is a schematic structural diagram illustrating an implementation of a primary device according to the present specification.
- the implementations of the present specification provide a vehicle identification method, which can improve the accuracy of vehicle identification and the accuracy of detecting the location of a vehicle as well as having relatively high generality.
- FIG. 1 is a flowchart illustrating an implementation of a vehicle identification method according to the present specification. As shown in FIG. 1 , the vehicle identification method can include the following steps.
- Step 102 A primary device sends a low-frequency signal with a predetermined radiation range.
- the primary device is a device that actively sends the low-frequency signal and corresponds to a secondary device.
- the secondary device is usually in a sleep state, and makes a response after receiving the low-frequency signal sent by the primary device.
- the magnetic field signal dominates in a low-frequency signal, and the radiation range of the low-frequency signal is easy to control, a radius is usually 3 meters.
- the primary device can communicate with the secondary device by controlling the radiation range of the low-frequency signal sent by the primary device. For example, only a secondary device within the radiation range can receive the low-frequency signal, while a secondary device outside the radiation range cannot receive the low-frequency signal or can only receive a low-frequency signal with very weak signal strength.
- the radiation range of the low-frequency signal can include a radiation angle and a radiation radius of the low-frequency signal.
- the primary device can be installed at a certain fixed location on a roadside, as shown in FIG. 2 .
- the secondary device can be installed on a vehicle. Therefore, in some implementations, the radiation angle and the radiation radius of the low-frequency signal can be determined based on the location of the primary device relative to a lane that needs to be detected, the width of the lane, and/or the length of the vehicle, etc., so that only a secondary device included in a vehicle travelling in the lane that needs to be detected by the primary device can receive the low-frequency signal.
- the radiation range can be predetermined or dynamically determined.
- the radiation range can be determined with different values for different scenarios or use environments.
- the radiation range can be pre-determined with different values of radiation angle and radiation radius for different use environments.
- the radiation range being predetermined is used as an illustrative example, which does not limit the scope of the disclosure.
- FIG. 2 is a schematic diagram illustrating installation locations of a primary device and a secondary device according to an implementation of the present specification.
- Step 104 Receive a response signal sent by the secondary device located on a vehicle responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a determined threshold.
- the determined threshold can be self-determined based on an implementation requirement, system performance, etc.
- the predetermined threshold is not limited in this implementation.
- the determined threshold can be predetermined or dynamically determined and can be determined with different values for different use environment and scenarios.
- the secondary device being located on the vehicle includes the scenarios that the secondary device is integrated in the vehicle as an integral part of the vehicle, coupled electrically and/or mechanically to the vehicle, or carried on the vehicle, or any other scenarios that the secondary device is located on the vehicle.
- the secondary device is “woken up” from the sleep state only when the vehicle on which the secondary device is located enters or is within the radiation range.
- the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal.
- the secondary device sends the response signal to the primary device, so that the primary device can determine that the distance between the vehicle on which the secondary device is located and the primary device is less than the radiation radius of the low-frequency signal solely based on the received response signal. Therefore, the location of the vehicle on which the secondary device is located can be determined accurately.
- the signal strength is configured to attenuate or decrease based on the determined radiation range. For example, the signal strength decreases to a level that is below the determined threshold at an edge of the radiation range.
- the determined threshold is determined based on the determined radiation range. In some implementations, the determined threshold is determined based on the signal strength of the low-frequency signal at the edge of the determined radiation range. For example, the determined threshold is equal to a signal strength at the edge of the radiation range.
- Step 106 Communicate with the secondary device to obtain identity information of the vehicle on which the secondary device is located.
- the identity information of the vehicle can include one or a combination of a vehicle license plate number, an engine number, and a frame number. Certainly, the identity information of the vehicle can further include other information that can uniquely identify the vehicle. Specific information included in the identity information of the vehicle is not limited in this implementation.
- the communicating with the secondary device to obtain the identity information of the vehicle on which the secondary device is located can be: communicating with the secondary device to receive the identity information of the vehicle on which the secondary device is located that is sent by the secondary device; or communicating with the secondary device to receive an identifier of the secondary device that is sent by the secondary device, and obtain the identity information of the vehicle on which the secondary device is located based on the identifier of the secondary device.
- the identity information of the vehicle can be pre-stored in the secondary device.
- the secondary device can directly send the identity information of the vehicle on which the secondary device is located to the primary device, and the primary device receives the identity information of the vehicle that is sent by the secondary device.
- a user when the secondary device is used for the first time, a user can submit the identifier of the secondary device and the identity information of the vehicle on which the secondary device is located to a server.
- the secondary device In a process in which the primary device communicates with the secondary device, the secondary device only needs to send the identifier of the secondary device to the primary device, and the primary device receives the identifier of the secondary device and then obtains the identity information of the vehicle on which the secondary device is located from the server based on the identifier of the secondary device.
- the primary device can communicate with the server to send the identity information of the vehicle to the server, so that the server can obtain a user account associated with the identity information of the vehicle and then perform an operation such as deducting a fare from the user account, and/or pushing a message to the user account.
- the primary device after sending the low-frequency signal, receives the response signal sent by the secondary device responding to the low-frequency signal, and communicates with the secondary device to obtain the identity information of the vehicle on which the secondary device is located, so that the vehicle can be identified.
- the response signal is sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that the signal strength of the low-frequency signal is greater than or equal to the predetermined threshold, and the signal strength of the low-frequency signal rapidly attenuates as the distance increases, so that the primary device can determine the location of the vehicle on which the secondary device is located solely based on the received response signal. Therefore, the location of the vehicle on which the secondary device is located can be determined accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 3 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification. As shown in FIG. 3 , before step 106 , the method can further include the following step.
- Step 302 Determine that the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine that the vehicle on which the secondary device is located is a vehicle to be identified.
- the radiation range of the low-frequency signal can include the radiation angle and the radiation radius of the low-frequency signal
- that the secondary device falls within the radiation range of the low-frequency signal can be that the distance between the secondary device and the primary device is less than or equal to the radiation radius of the low-frequency signal.
- the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal, that is, the distance between the secondary device and the primary device is less than or equal to the radiation radius of the low-frequency signal.
- the secondary device sends the response signal to the primary device, so that the primary device can determine that the secondary device falls within the radiation range of the low-frequency signal solely based on the received response signal and then can determine that the vehicle on which the secondary device is located is located within the radiation range of the low-frequency signal.
- the primary device can determine that the vehicle within the radiation range of the low-frequency signal is the vehicle to be identified, so that the location of the vehicle on which the secondary device is located can be determined accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 4 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification. As shown in FIG. 4 , the vehicle identification method can include the following steps.
- Step 402 A secondary device receives a low-frequency signal sent by a primary device.
- the primary device is a device that actively sends the low-frequency signal and corresponds to the secondary device.
- the secondary device is usually in a sleep state.
- the primary device can be installed at a certain fixed location on a roadside, as shown in FIG. 2 .
- a radiation range of the low-frequency signal sent by the primary device is predetermined.
- the secondary device can be installed on a vehicle, and the secondary device can receive the low-frequency signal sent by the primary device after entering the radiation range of the low-frequency signal.
- Step 404 Detect signal strength of the low-frequency signal.
- Step 406 Send a response signal to the primary device in response to the signal strength of the low-frequency signal being greater than or equal to a predetermined threshold.
- the predetermined threshold can be self-determined based on an implementation requirement, system performance, etc.
- the predetermined threshold is not limited in this implementation.
- the secondary device After receiving the low-frequency signal, the secondary device detects the signal strength of the low-frequency signal. In response to the signal strength of the low-frequency signal being greater than or equal to the predetermined threshold, the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal. In this case, the secondary device sends the response signal to the primary device, so that the primary device can determine the location of the vehicle on which the secondary device is located solely based on the received response signal. Therefore, the vehicle on which the secondary device is located can be positioned accurately.
- Step 408 Communicate with the primary device to cause the primary device to obtain identity information of the vehicle on which the secondary device is located.
- the identity information of the vehicle can include one or a combination of a vehicle license plate number, an engine number, and a frame number. Certainly, the identity information of the vehicle can further include other information that can uniquely identify the vehicle. Specific information included in the identity information of the vehicle is not limited in this implementation.
- the communicating with the primary device to cause the primary device to obtain the identity information of the vehicle on which the secondary device is located can be: communicating with the primary device to send the identity information of the vehicle on which the secondary device is located to the primary device; or communicating with the primary device to send an identifier of the secondary device to the primary device, to cause the primary device to obtain the identity information of the vehicle on which the secondary device is located based on the identifier of the secondary device.
- the secondary device After receiving the low-frequency signal sent by the primary device, the secondary device detects the signal strength of the low-frequency signal. In response to the signal strength of the low-frequency signal being greater than or equal to the predetermined threshold, the secondary device sends the response signal to the primary device, and communicates with the primary device to cause the primary device to obtain the identity information of the vehicle on which the secondary device is located, so that the primary device can accurately determine the location of the vehicle on which the secondary device is located, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 5 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification. As shown in FIG. 5 , the vehicle identification method can include the following steps.
- Step 502 A primary device located on a vehicle sends a low-frequency signal with a predetermined radiation range.
- the radiation range of the low-frequency signal can include a radiation angle and a radiation radius of the low-frequency signal.
- the primary device can be installed on a vehicle, and the secondary device can be installed at a certain fixed location on a roadside, as shown in FIG. 6 . Therefore, in some implementations, the radiation angle and the radiation radius of the low-frequency signal can be determined based on the installation location of the secondary device, so that the radiation range of the low-frequency signal sent by the primary device can cover the secondary device when the vehicle in which the primary device is installed travels on a road on which the secondary device is installed.
- FIG. 6 is a schematic diagram illustrating installation locations of a primary device and a secondary device according to another implementation of the present specification.
- Step 504 Receive a response signal sent by the secondary device responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold.
- the predetermined threshold can be self-determined based on an implementation requirement, system performance, etc.
- the predetermined threshold is not limited in this implementation.
- the secondary device is “woken up” from a sleep state only when the secondary device enters the radiation range of the low-frequency signal.
- the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal.
- the secondary device sends the response signal to the primary device, so that the primary device can determine that the distance between the vehicle on which the primary device is located and the secondary device is less than or equal to the radiation radius of the low-frequency signal solely based on the received response signal.
- Step 506 Communicate with the secondary device to cause the secondary device to obtain identity information of the vehicle on which the primary device is located.
- the communicating with the secondary device to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located can be: communicating with the secondary device to send the identity information of the vehicle on which the primary device is located to the secondary device; or communicating with the secondary device to send an identifier of the primary device to the secondary device, to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located based on the identifier of the primary device.
- the identity information of the vehicle can be pre-stored in the primary device.
- the primary device can directly send the identity information of the vehicle on which the primary device is located to the secondary device, and the secondary device receives the identity information of the vehicle that is sent by the primary device.
- a user when the primary device is used for the first time, a user can submit the identifier of the primary device and the identity information of the vehicle on which the primary device is located to a server.
- the primary device In a process in which the primary device communicates with the secondary device, the primary device only needs to send the identifier of the primary device to the secondary device, and the secondary device receives the identifier of the primary device and then obtains the identity information of the vehicle on which the primary device is located from the server based on the identifier of the primary device.
- the secondary device can communicate with the server and send the identity information of the vehicle to the server, so that the server can obtain a user account associated with the identity information of the vehicle and then perform an operation such as deducting a fare from the user account, and/or pushing a message to the user account.
- the primary device after sending the low-frequency signal, receives the response signal sent by the secondary device responding to the low-frequency signal, and communicates with the secondary device to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located, so that the vehicle can be identified.
- the response signal is sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that the signal strength of the low-frequency signal is greater than or equal to the predetermined threshold, and the signal strength of the low-frequency signal rapidly attenuates as the distance increases, so that the primary device can determine the distance between the secondary device and the vehicle on which the primary device is located solely based on the received response signal. Therefore, the location of the vehicle on which the primary device is located can be determined accurately, thereby alleviating the interference from vehicles following up and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 7 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification. As shown in FIG. 7 , in the implementation shown in FIG. 5 in the present specification, before step 506 , the method can further include the following step.
- Step 702 Determine that the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine that the vehicle on which the primary device is located is a vehicle to be identified.
- the radiation range of the low-frequency signal can include the radiation angle and the radiation radius of the low-frequency signal
- that the secondary device falls within the radiation range of the low-frequency signal can be that the distance between the secondary device and the primary device is less than or equal to the radiation radius of the low-frequency signal.
- the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal, that is, the distance between the secondary device and the primary device is less than or equal to the radiation radius of the low-frequency signal.
- the secondary device sends the response signal to the primary device, so that the primary device can determine that the secondary device falls within the radiation range of the low-frequency signal solely based on the received response signal and then can determine that the vehicle on which the primary device is located is the vehicle to be identified. Therefore, the location of the vehicle on which the primary device is located can be determined accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 8 is a flowchart illustrating another implementation of a vehicle identification method according to the present specification. As shown in FIG. 8 , the vehicle identification method can include the following steps.
- Step 802 A secondary device receives a low-frequency signal sent by a primary device.
- the primary device is a device that actively sends the low-frequency signal and corresponds to the secondary device.
- the secondary device is usually in a sleep state.
- the primary device can be installed in a vehicle, as shown in FIG. 6 .
- a radiation range of the low-frequency signal sent by the primary device is predetermined.
- the secondary device can be installed on a certain fixed location on a roadside, and the secondary device can receive the low-frequency signal sent by the primary device after entering the radiation range of the low-frequency signal.
- Step 804 Detect signal strength of the low-frequency signal.
- Step 806 Send a response signal to the primary device in response to the signal strength of the low-frequency signal being greater than or equal to a predetermined threshold.
- the predetermined threshold can be self-determined based on an implementation requirement, system performance, etc.
- the predetermined threshold is not limited in this implementation.
- the secondary device After receiving the low-frequency signal, the secondary device detects the signal strength of the low-frequency signal. In response to the signal strength of the low-frequency signal being greater than or equal to the predetermined threshold, the secondary device determines that the secondary device falls within the radiation range of the low-frequency signal. In this case, the secondary device sends the response signal to the primary device, so that the primary device can determine the distance between the secondary device and the vehicle on which the primary device is located is less than or equal to the radiation radius of the low-frequency signal solely based on the received response signal. Therefore, the vehicle on which the primary device is located can be positioned accurately, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified.
- Step 808 Communicate with the primary device to obtain identity information of the vehicle on which the primary device is located.
- the identity information of the vehicle can include one or a combination of a vehicle license plate number, an engine number, and a frame number. Certainly, the identity information of the vehicle can further include other information that can uniquely identify the vehicle. Specific information included in the identity information of the vehicle is not limited in this implementation.
- the communicating with the primary device to obtain the identity information of the vehicle on which the primary device is located can be: communicating with the primary device to receive the identity information of the vehicle on which the primary device is located that is sent by the primary device; or communicating with the primary device to receive an identifier of the primary device that is sent by the primary device, to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located based on the identifier of the primary device.
- the secondary device After receiving the low-frequency signal sent by the primary device, the secondary device detects the signal strength of the low-frequency signal. In response to the signal strength of the low-frequency signal being greater than or equal to the predetermined threshold, the secondary device sends the response signal to the primary device, and communicates with the primary device to obtain the identity information of the vehicle on which the primary device is located, so that the vehicle can be identified. In addition, the primary device can determine that the distance between the secondary device and the vehicle on which the primary device is located is less than or equal to the radiation radius of the low-frequency signal based on the response signal, thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 2 and FIG. 6 in the present specification provide two types of installation locations of a primary device and a secondary device.
- the methods in FIG. 2 and FIG. 6 can be combined, that is, both a primary device and a secondary device are disposed at fixed locations on a roadside and both a primary device and a secondary device are disposed in a vehicle.
- a principle that magnetic field strength rapidly attenuates as the distance increases is mainly used, and signal strength of a magnetic field signal can approach 0 outside 3 m. Therefore, the location of a vehicle can be determined based on signal strength of a low-frequency signal.
- signal strength attenuates very slightly within a short distance (for example, 10 m), and therefore, the location of a vehicle cannot be determined based on signal strength.
- the vehicle identification method provided in the implementations of the present specification has relatively low implementation costs and relatively high accuracy of determining the location of a vehicle (at a centimeter level), thereby alleviating interference from vehicles following and bypassing the vehicle to be identified and improving the accuracy of vehicle identification.
- FIG. 9 is a schematic structural diagram illustrating an implementation of a vehicle identification apparatus according to the present specification.
- the vehicle identification apparatus can include a sending module 91 , a receiving module 92 , and an acquisition module 93 .
- the sending module 91 is configured to send a low-frequency signal with a predetermined radiation range.
- the receiving module 92 is configured to receive a response signal sent by a secondary device located on a vehicle responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold.
- the acquisition module 93 is configured to communicate with the secondary device to obtain identity information of the vehicle on which the secondary device is located.
- the acquisition module 93 is configured to communicate with the secondary device to receive the identity information of the vehicle on which the secondary device is located that is sent by the secondary device; or communicate with the secondary device to receive an identifier of the secondary device that is sent by the secondary device, and obtain the identity information of the vehicle on which the secondary device is located based on the identifier of the secondary device.
- the vehicle identification apparatus provided in the implementation shown in FIG. 9 is configured to perform the technical solutions of the method implementation shown in FIG. 1 in the present specification.
- FIG. 10 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification. Compared with the vehicle identification apparatus shown in FIG. 9 , the vehicle identification apparatus shown in FIG. 10 can further include a determining module 94 .
- the determining module 94 is configured to: before the acquisition module 93 obtains the identity information of the vehicle on which the secondary device is located, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the secondary device is located is a vehicle to be identified.
- the vehicle identification apparatus provided in the implementation shown in FIG. 10 is configured to perform the technical solutions of the method implementations shown in FIG. 1 to FIG. 3 in the present specification.
- FIG. 11 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- the vehicle identification apparatus can include a receiving module 1101 , a detection module 1102 , a sending module 1103 , and a communication module 1104 .
- the receiving module 1101 is configured to receive a low-frequency signal sent by a primary device.
- the detection module 1102 is configured to detect signal strength of the low-frequency signal.
- the sending module 1103 is configured to send a response signal to the primary device in response to the signal strength of the low-frequency signal being greater than or equal to a predetermined threshold.
- the communication module 1104 is configured to communicate with the primary device to cause the primary device to obtain identity information of a vehicle on which the secondary device is located.
- the vehicle identification apparatus provided in the implementation shown in FIG. 11 is configured to perform the technical solutions of the method implementation shown in FIG. 4 in the present specification.
- FIG. 12 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification.
- the vehicle identification apparatus can include a sending module 1201 , a receiving module 1202 , and a communication module 1203 .
- the sending module 1201 is configured to send a low-frequency signal with a predetermined radiation range.
- the receiving module 1202 is configured to receive a response signal sent by a secondary device responding to the low-frequency signal, the response signal being sent by the secondary device in response to the secondary device receiving the low-frequency signal and detecting that signal strength of the low-frequency signal is greater than or equal to a predetermined threshold.
- the communication module 1203 is configured to communicate with the secondary device to cause the secondary device to obtain identity information of a vehicle on which the primary device is located.
- the communication module 1203 is configured to communicate with the secondary device to send the identity information of the vehicle on which the primary device is located to the secondary device; or communicate with the secondary device to send an identifier of the primary device to the secondary device, to cause the secondary device to obtain the identity information of the vehicle on which the primary device is located based on the identifier of the primary device.
- the vehicle identification apparatus provided in the implementation shown in FIG. 12 is configured to perform the technical solutions of the method implementation shown in FIG. 5 in the present specification.
- FIG. 13 is a schematic structural diagram illustrating another implementation of a vehicle identification apparatus according to the present specification. Compared with the vehicle identification apparatus shown in FIG. 12 , the vehicle identification apparatus shown in FIG. 13 can further include a determining module 1204 .
- the determining module 1204 is configured to: before the communication module 1203 communicates with the secondary device, determine whether the secondary device falls within the radiation range of the low-frequency signal based on the response signal, and determine whether the vehicle on which the primary device is located is a vehicle to be identified.
- the vehicle identification apparatus provided in the implementation shown in FIG. 13 is configured to perform the technical solutions of the method implementations shown in FIG. 5 to FIG. 7 in the present specification.
- FIG. 14 is a schematic structural diagram illustrating an implementation of a primary device according to the present specification.
- the primary device can include at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the vehicle identification methods provided in the implementations shown in FIG. 1 to FIG. 3 in the present specification.
- the primary device can be a device that actively sends a low-frequency signal.
- the specific form of the primary device is not limited in this implementation.
- FIG. 14 is a block diagram illustrating an example primary device adapted to implement the implementations of the present specification.
- the primary device shown in FIG. 14 is only an example, and should not constitute any limitation on the functions and use scope of the implementations of the present specification.
- the primary device is represented as a common computing device.
- Components of the primary device can include but are not limited to one or more processors 410 , a communication interface 420 , a memory 430 , and a communication bus 440 connecting different components (including the memory 430 , the communication interface 420 , and the processing unit 410 ).
- the communication bus 440 represents one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, or a local bus that uses any one of multiple bus structures.
- the communication bus 440 can include but is not limited to an industry standard architecture (ISA) bus, a micro channel architecture (MCA) bus, an enhanced ISA bus, a video electronics standards association (VESA) local bus, and a peripheral component interconnection (PCI) bus.
- ISA industry standard architecture
- MCA micro channel architecture
- VESA video electronics standards association
- PCI peripheral component interconnection
- the primary device typically includes multiple computer system readable media. These media can be any available media that can be accessed by the primary device, including volatile and non-volatile media, removable and non-removable media.
- the memory 430 can include a computer system readable medium in a form of a volatile memory, such as a random access memory (RAM) and/or a cache memory.
- the memory 430 can include at least one program product.
- the program product has a group of program modules (for example, at least one program module) configured to perform the functions of the implementations shown in FIG. 1 to FIG. 3 in the present specification.
- a program/utility tool having a group of program modules can be stored in the memory 430 .
- the program module includes but is not limited to an operating system, one or more application programs, other program modules, and program data. Any one or a certain combination of these examples may include an implementation of a network environment.
- the program module usually performs the functions and/or methods in the implementations described in FIG. 1 to FIG. 3 in the present specification.
- the processor 410 runs the program stored in the memory 430 , to perform various functional applications and data processing, for example, implement the vehicle identification methods provided in the implementations shown in FIG. 1 to FIG. 3 in the present specification.
- the implementations of the present specification further provide a secondary device, including: at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the vehicle identification method provided in the implementation shown in FIG. 4 in the present specification.
- the secondary device corresponds to a primary device, is usually in a sleep state, and makes a response after receiving a low-frequency signal.
- the secondary device can be implemented by using the structure shown in FIG. 14 . Details are omitted herein for simplicity.
- the implementations of the present specification further provide a primary device, including: at least one processor; and at least one memory communicatively connected to the processor.
- the memory stores program instructions executable by the processor, and invocable by the processor to perform the vehicle identification methods provided in the implementations shown in FIG. 5 to FIG. 7 in the present specification.
- the primary device can be a device that actively sends a low-frequency signal.
- a specific form of the primary device is not limited in this implementation.
- the primary device can be implemented by using the structure shown in FIG. 14 . Details are omitted herein for simplicity.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the vehicle identification methods provided in the implementations shown in FIG. 1 to FIG. 3 in the present specification.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the vehicle identification method provided in the implementation shown in FIG. 4 in the present specification.
- the implementations of the present specification provide a non-transient computer-readable storage medium.
- the non-transient computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to perform the vehicle identification methods provided in the implementations shown in FIG. 5 to FIG. 7 in the present specification.
- the non-transient computer-readable storage medium can be any combination of one or more computer-readable media.
- the computer-readable media can be computer-readable signal media or computer-readable storage media.
- the computer-readable storage medium can be but is limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof.
- a more specific example (non-exhaustive list) of the computer-readable storage medium includes an electrical connection having one or more leads, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable erasable programmable read-only memory (EPROM) or a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.
- the computer-readable storage medium can be any tangible medium that includes or stores a program, and the program can be used by or in combination with an instruction execution system, apparatus, or device.
- the computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier, and the data signal includes computer-readable program code.
- the propagated data signal can be in various forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination thereof.
- the computer-readable signal medium can be any computer-readable medium other than the computer-readable storage medium, and the computer-readable medium can send, propagate, or transmit a program used by or in combination with an instruction execution system, apparatus, or device.
- Program code included in the computer-readable medium can be transmitted by using any suitable medium, including but not limited to a wireless medium, a wire, an optical cable, a radio frequency (RF) medium, or any suitable combination thereof.
- a wireless medium including but not limited to a wireless medium, a wire, an optical cable, a radio frequency (RF) medium, or any suitable combination thereof.
- RF radio frequency
- Computer program code used to perform the operations of the present specification can be written in one or more programming languages or a combination thereof.
- the programming languages include an object-oriented programming language such as Java, Smalltalk, or C++, and also include a conventional procedural programming language such as “C” language or a similar programming language.
- the program code can be completely executed in a user computer, partially completely in a user computer, executed as an independent software package, partially executed in a user computer and partially executed in a remote computer, or completely executed in a remote computer or server.
- the remote computer can be connected to a user computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (via, for example, the Internet by using an Internet service provider).
- LAN local area network
- WAN wide area network
- references terms such as “an implementation”, “some implementations”, “an example”, “a specific example”, and “some examples” mean that specific features, structures, materials, or characteristics described with reference to the implementations or examples are included in at least one implementation or example of the present specification.
- example expressions of the terms are not necessarily specific to the same implementation or example.
- the described specific features, structures, materials, or characteristics can be combined in a proper way in any one or more of the implementations or examples.
- a person skilled in the art can integrate or combine different implementations or examples and features of different implementations or examples described in the present specification, provided that they do not conflict with each other.
- first and second are merely intended for description, and shall not be understood as an indication or implication of relative importance or an implicit indication of the number of indicated technical features. Therefore, a feature limited by “first” or “second” can explicitly or implicitly include at least one such feature. In the description of the present specification, “multiple” means at least two, for example, two or three, unless otherwise specifically limited.
- the word “if” used herein can be explained as “while”, “when”, “in response to determining”, or “in response to detection”.
- phrases “if determining” or “if detecting (a stated condition or event)” can be explained as “when determining”, “in response to determining”, “when detecting (the stated condition or event)”, or “in response to detecting (the stated condition or event)”.
- the terminal in the implementations of the present specification can include but is not limited to a personal computer (PC), a personal digital assistant (PDA), a wireless handheld device, a tablet computer (tablet computer), a mobile phone, an MP3 player, an MP4 player, etc.
- PC personal computer
- PDA personal digital assistant
- wireless handheld device a wireless handheld device
- tablet computer tablet computer
- mobile phone an MP3 player, an MP4 player, etc.
- the disclosed system, apparatus, and method can be implemented in other ways.
- the described apparatus implementations are merely examples.
- the unit division is merely logical function division and can be other division during actual implementation.
- multiple units or components can be combined or integrated into another system, or some features may be ignored or may not be performed.
- the displayed or discussed mutual couplings or direct couplings or communication connections can be implemented by using some interfaces.
- the indirect couplings or communication connections between the apparatuses or units can be implemented in electronic, mechanical, or other forms.
- functional units in the implementations of the present specification can be integrated into one processing unit, or each of the units can exist alone physically, or two or more units can be integrated into one unit.
- the integrated unit can be implemented in a form of hardware, or can be implemented in a form of hardware in combination with a software functional unit.
- the integrated unit implemented in a form of a software functional unit can be stored in a computer-readable storage medium.
- the software functional unit is stored in a storage medium and includes several instructions for instructing a computer apparatus (which can be a personal computer, a server, a network apparatus, etc.) or a processor (processor) to perform some of the steps of the methods described in the implementations of the present specification.
- the storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc.
Abstract
Description
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US20220013004A1 (en) | 2022-01-13 |
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